function swap(target, url, postData) {
	var req = createXMLHTTPObject();
	if (!req) return;
	var method = (postData) ? "POST" : "GET";
	req.open(method,url,true);
//	req.setRequestHeader('User-Agent','XMLHTTP/1.0');
	if (postData)
		req.setRequestHeader('Content-type','application/x-www-form-urlencoded');
	req.onreadystatechange = function () {
		if (req.readyState != 4) return;
		if (req.status != 200 && req.status != 304) {
			alert('HTTP error ' + req.status);
			return;
		}
		document.getElementById(target).innerHTML = req.responseText;
	}
	if (req.readyState == 4) return;
	req.send(postData);
}

var XMLHttpFactories = [
	function () {return new XMLHttpRequest()},
	function () {return new ActiveXObject("Msxml2.XMLHTTP")},
	function () {return new ActiveXObject("Msxml3.XMLHTTP")},
	function () {return new ActiveXObject("Microsoft.XMLHTTP")}
];

function createXMLHTTPObject() {
	var xmlhttp = false;
	for (var i=0; i<XMLHttpFactories.length; i++) {
		try {
			xmlhttp = XMLHttpFactories[i]();
		}
		catch (e) {
			continue;
		}
		break;
	}
	return xmlhttp;
}



function showKnockout(url) {
	var tmp = document.getElementById( 'Knockout' ); 

	tmp.innerHTML = '';
//	tmp.style.top = (document.body.scrollTop) + 'px';
	tmp.className = '';
	swap('Knockout', url);
	return;
}

function hideKnockout() {
	var tmp = document.getElementById( 'Knockout' ); 
	tmp.innerHTML = '';
	tmp.className = 'hidden';
	return;
}